<?php
/*
 * CKFinder
 * ========
 * http://ckfinder.com
 * Copyright (C) 2007-2011, CKSource - Frederico Knabben. All rights reserved.
 *
 * The software, this file and its contents are subject to the CKFinder
 * License. Please read the license.txt file before using, installing, copying,
 * modifying or distribute this file or part of its contents. The contents of
 * this file is part of the Source Code of CKFinder.
 *
 * CKFinder extension: resize image according to a given size
 */
if (!defined('IN_CKFINDER')) exit;

/**
 * Include base XML command handler
 */
require_once CKFINDER_CONNECTOR_LIB_DIR . "/CommandHandler/XmlCommandHandlerBase.php";

class CKFinder_Connector_CommandHandler_ImageResize extends CKFinder_Connector_CommandHandler_XmlCommandHandlerBase
{
	/**
	 * @access private
	 */
	function getConfig()
	{
		$config = array();
		if (isset($GLOBALS['config']['plugin_imageresize'])) {
			$config = $GLOBALS['config']['plugin_imageresize'];
		}
		if (!isset($config['smallThumb'])) {
			$config['smallThumb'] = "90x90";
		}
		if (!isset($config['mediumThumb'])) {
			$config['mediumThumb'] = "120x120";
		}
		if (!isset($config['largeThumb'])) {
			$config['largeThumb'] = "180x180";
		}
		return $config;
	}

	/**
	 * handle request and build XML
	 * @access protected
	 *
	 */
	function buildXml()
	{
		if (empty($_POST['CKFinderCommand']) || $_POST['CKFinderCommand'] != 'true') {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
		}

		$this->checkConnector();
		$this->checkRequest();

		//resizing to 1x1 is almost equal to deleting a file, that's why FILE_DELETE permissions are required
		if (!$this->_currentFolder->checkAcl(CKFINDER_CONNECTOR_ACL_FILE_DELETE) || !$this->_currentFolder->checkAcl(CKFINDER_CONNECTOR_ACL_FILE_UPLOAD)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_UNAUTHORIZED);
		}

		$_config =& CKFinder_Connector_Core_Factory::getInstance("Core_Config");
		$resourceTypeInfo = $this->_currentFolder->getResourceTypeConfig();

		if (!isset($_POST["fileName"])) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_NAME);
		}

		$fileName = CKFinder_Connector_Utils_FileSystem::convertToFilesystemEncoding($_POST["fileName"]);

		if (!CKFinder_Connector_Utils_FileSystem::checkFileName($fileName) || $resourceTypeInfo->checkIsHiddenFile($fileName)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
		}

		if (!$resourceTypeInfo->checkExtension($fileName, false)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
		}

		$filePath = CKFinder_Connector_Utils_FileSystem::combinePaths($this->_currentFolder->getServerPath(), $fileName);

		if (!file_exists($filePath) || !is_file($filePath)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_FILE_NOT_FOUND);
		}

		$newWidth = trim($_POST['width']);
		$newHeight = trim($_POST['height']);
		$quality = 80;
		$resizeOriginal = !empty($_POST['width']) && !empty($_POST['height']);

		if ($resizeOriginal) {
			if (!preg_match("/^\d+$/", $newWidth) || !preg_match("/^\d+$/", $newHeight) || !preg_match("/^\d+$/", $newWidth)) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
			}
			if (!isset($_POST["newFileName"])) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_NAME);
			}
			$newFileName = CKFinder_Connector_Utils_FileSystem::convertToFilesystemEncoding($_POST["newFileName"]);
			if (!$resourceTypeInfo->checkExtension($newFileName)) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_EXTENSION);
			}
			if (!CKFinder_Connector_Utils_FileSystem::checkFileName($newFileName) || $resourceTypeInfo->checkIsHiddenFile($newFileName)) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_NAME);
			}
			$newFilePath = CKFinder_Connector_Utils_FileSystem::combinePaths($this->_currentFolder->getServerPath(), $newFileName);
			if (!is_writable(dirname($newFilePath))) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_ACCESS_DENIED);
			}
			if ($_POST['overwrite'] != "1" && file_exists($newFilePath)) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_ALREADY_EXIST);
			}
			$_imagesConfig = $_config->getImagesConfig();
			$maxWidth = $_imagesConfig->getMaxWidth();
			$maxHeight = $_imagesConfig->getMaxHeight();
			// Shouldn't happen as the JavaScript validation should not allow this.
			if ( ( $maxWidth > 0 && $newWidth > $maxWidth ) || ( $maxHeight > 0 && $newHeight > $maxHeight ) ) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
			}
		}

		require_once CKFINDER_CONNECTOR_LIB_DIR . "/CommandHandler/Thumbnail.php";

		if ($resizeOriginal) {
			$result = CKFinder_Connector_CommandHandler_Thumbnail::createThumb($filePath, $newFilePath, $newWidth, $newHeight, $quality, false) ;
			if (!$result) {
				$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_ACCESS_DENIED);
			}
		}

		$config = $this->getConfig();
		$nameWithoutExt = preg_replace("/^(.+)\_\d+x\d+$/", "$1", CKFinder_Connector_Utils_FileSystem::getFileNameWithoutExtension($fileName));
		$extension = CKFinder_Connector_Utils_FileSystem::getExtension($fileName);
		foreach (array('small', 'medium', 'large') as $size) {
			if (!empty($_POST[$size]) && $_POST[$size] == '1') {
				$thumbName = $nameWithoutExt."_".$size.".".$extension;
				$newFilePath = CKFinder_Connector_Utils_FileSystem::combinePaths($this->_currentFolder->getServerPath(), $thumbName);
				if (!empty($config[$size.'Thumb'])) {
					if (preg_match("/^(\d+)x(\d+)$/", $config[$size.'Thumb'], $matches)) {
						CKFinder_Connector_CommandHandler_Thumbnail::createThumb($filePath, $newFilePath, $matches[1], $matches[2], $quality, true) ;
					}
				}
			}
		}

	}

	/**
	 * @access public
	 */
	function onInitCommand( &$connectorNode )
	{
		// "@" protects against E_STRICT (Only variables should be assigned by reference)
		@$pluginsInfo = &$connectorNode->getChild("PluginsInfo");
		$imageresize = new CKFinder_Connector_Utils_XmlNode("imageresize");
		$pluginsInfo->addChild($imageresize);
		$config = $this->getConfig();
		foreach (array('small', 'medium', 'large') as $size) {
			if (!empty($config[$size.'Thumb'])) {
				$imageresize->addAttribute($size.'Thumb', $config[$size.'Thumb']);
			}
		}
		return true ;
	}

	/**
	 * @access public
	 */
	function onBeforeExecuteCommand( &$command )
	{
		if ( $command == 'ImageResize' )
		{
			$this->sendResponse();
			return false;
		}

		return true ;
	}
}

class CKFinder_Connector_CommandHandler_ImageResizeInfo extends CKFinder_Connector_CommandHandler_XmlCommandHandlerBase
{
	/**
	 * handle request and build XML
	 * @access protected
	 *
	 */
	function buildXml()
	{
		$this->checkConnector();
		$this->checkRequest();

		if (!$this->_currentFolder->checkAcl(CKFINDER_CONNECTOR_ACL_FILE_VIEW)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_UNAUTHORIZED);
		}

		$resourceTypeInfo = $this->_currentFolder->getResourceTypeConfig();

		if (!isset($_GET["fileName"])) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_NAME);
		}

		$fileName = CKFinder_Connector_Utils_FileSystem::convertToFilesystemEncoding($_GET["fileName"]);

		if (!CKFinder_Connector_Utils_FileSystem::checkFileName($fileName) || $resourceTypeInfo->checkIsHiddenFile($fileName)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
		}

		if (!$resourceTypeInfo->checkExtension($fileName, false)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
		}

		$filePath = CKFinder_Connector_Utils_FileSystem::combinePaths($this->_currentFolder->getServerPath(), $fileName);

		if (!file_exists($filePath) || !is_file($filePath)) {
			$this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_FILE_NOT_FOUND);
		}

		list($width, $height) = getimagesize($filePath);
		$oNode = new Ckfinder_Connector_Utils_XmlNode("ImageInfo");
		$oNode->addAttribute("width", $width);
		$oNode->addAttribute("height", $height);
		$this->_connectorNode->addChild($oNode);
	}

	/**
	 * @access public
	 */
	function onBeforeExecuteCommand( &$command )
	{
		if ( $command == 'ImageResizeInfo' )
		{
			$this->sendResponse();
			return false;
		}

		return true ;
	}
}

if (function_exists('imagecreate')) {
	$CommandHandler_ImageResize = new CKFinder_Connector_CommandHandler_ImageResize();
	$CommandHandler_ImageResizeInfo = new CKFinder_Connector_CommandHandler_ImageResizeInfo();
	$config['Hooks']['BeforeExecuteCommand'][] = array($CommandHandler_ImageResize, "onBeforeExecuteCommand");
	$config['Hooks']['BeforeExecuteCommand'][] = array($CommandHandler_ImageResizeInfo, "onBeforeExecuteCommand");
	$config['Hooks']['InitCommand'][] = array($CommandHandler_ImageResize, "onInitCommand");
	$config['Plugins'][] = 'imageresize';
}
